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QPair(3qt)									       QPair(3qt)

       QPair - Value-based template class that provides a pair of elements

       #include <qpair.h>

   Public Members
       typedef T1 first_type
       typedef T2 second_type
       QPair ()
       QPair ( const T1 & t1, const T2 & t2 )

       QPair qMakePair ( T1 t1, T2 t2 )

       The QPair class is a value-based template class that provides a pair of elements.

       QPair is a Qt implementation of an STL-like pair. It can be used in your application if
       the standard pair<> is not available on your target platforms.

       QPair<T1, T2> defines a template instance to create a pair of values that contains two
       values of type T1 and T2. Please note that QPair does not store pointers to the two
       elements; it holds a copy of every member. This is why these kinds of classes are called
       value based. If you're interested in pointer based classes see, for example, QPtrList and

       QPair holds one copy of type T1 and one copy of type T2, but does not provide iterators to
       access these elements. Instead, the two elements (first and second) are public member
       variables of the pair. QPair owns the contained elements. For more relaxed ownership
       semantics, see QPtrCollection and friends which are pointer-based containers.

       Some classes cannot be used within a QPair: for example, all classes derived from QObject
       and thus all classes that implement widgets. Only "values" can be used in a QPair. To
       qualify as a value the class must provide:

       A copy constructor

       An assignment operator

       A constructor that takes no arguments

       Note that C++ defaults to field-by-field assignment operators and copy constructors if no
       explicit version is supplied. In many cases this is sufficient.

       QPair uses an STL-like syntax to manipulate and address the objects it contains. See the
       QTL documentation for more information.

       Functions that need to return two values can use a QPair. The qMakePair() convenience
       function makes it easy to create QPair objects.

       See also Qt Template Library Classes, Implicitly and Explicitly Shared Classes, and Non-
       GUI Classes.

   Member Type Documentation
       The type of the first element in the pair.

       The type of the second element in the pair.

QPair::QPair ()
       Constructs an empty pair. The first and second elements are default constructed.

QPair::QPair ( const T1 & t1, const T2 & t2 )
       Constructs a pair and initializes the first element with t1 and the second element with

QPair qMakePair ( T1 t1, T2 t2 )
       This is a template convenience function. It is used to create a QPair<> object that
       contains t1 and t2. For example:

	       QMap<QString,QString> m;
	       m.insert( qMakePair("Clinton", "Bill") );

       The above code is equivalent to:

	       QMap<QString,QString> m;
	       QPair<QString,QString> p( "Clinton", "Bill" );
	       m.insert( p );

       http://doc.trolltech.com/qpair.html http://www.trolltech.com/faq/tech.html

       Copyright 1992-2001 Trolltech AS, http://www.trolltech.com.  See the license file included
       in the distribution for a complete license statement.

       Generated automatically from the source code.

       If you find a bug in Qt, please report it as described in
       http://doc.trolltech.com/bughowto.html.	Good bug reports help us to help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is located at
       $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is
       provided as a convenience for those users who prefer man pages, although this format is
       not officially supported by Trolltech.

       If you find errors in this manual page, please report them to qt-bugs@trolltech.com.
       Please include the name of the manual page (qpair.3qt) and the Qt version (3.1.1).

Trolltech AS				 9 December 2002			       QPair(3qt)
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